PGS TC36 AR manual Vent Terminal Minimum Clearances, Vent Terminal Clearance

VENT TERMINAL

CLEARANCE

Minimum clearances to the vent terminal must be maintained as shown in figure #22a

&b. Measure clearances to the nearest edge of termination hood.

NOTE: Vent terminal must not be recessed into a wall or siding.

NOTE: LOCAL CODES OR REGULA- TIONS MAY REQUIRE DIFFERENT CLEARANCES.

Fig. # 22a	VENT TERMINAL MINIMUM
	CLEARANCES TO ADJACENT
	STRUCTURES
	36"	24"
	(91.5 cm)
		(61 cm)
	24"
	(61 cm)
	48"
	(122 cm)
	ADJACENT
	STRUCTURES
	OR FENCE

Fig. # 22b

D

E

V

L B

F

C

VFIXED

CLOSED

V	OPEN-
	ABLE

B

VENT TERMINAL MINIMUM

CLEARANCES

INSIDE G

CORNER V

DETAIL

A H

V		B	V
	OPEN-	FIXED
	ABLE	CLOSED		I
			G	M

V J	A	V K	A
A

V VENT TERMINAL A AIR SUPPLY INLET

A= clearances above grade, veranda, porch, deck, or balcony [* 12 inches (30 cm) minimum]

B= clearance to window or door that may be opened [* 12 inches (30 cm) minimum]

C= clearance to permanently closed window [minimum 12 inches (30 cm) recommended to prevent condensation on window]

D= vertical clearance to ventilated soffi t located above the ter- minal within a horizontal distance of 2 feet (60 cm) from the edge of the terminal [30 inches (76 cm) minimum]

E= clearance to unventilated soffi t [30 inches (76 cm) minimum] F= clearance to outside corner [6 inches (15 cm) minimum] G= clearance to inside corner [6 inches (15 cm) minimum]

AREA WHERE TERMINAL		G GAS METER
IS NOT PERMITTED
H=	* not to be installed above a meter/regulator assembly within
	3 feet (90 cm) horizontally from the center-line of the regula-
	tor
I=	clearance to service regulator vent outlet [* 6 feet (1.8 m)
	minimum]
J=	clearance to non-mechanical air supply inlet to building or
	the combustion air inlet to any other appliance [* 12 inches
	(30 cm) minimum]
K=	clearance to a mechanical air supply inlet [* 6 feet (1.8 m)
	minimum]
L=	^ clearance above paved side-walk or a paved driveway
	located on public property [* 7 feet (2.1 m) minimum]
M=	clearance under veranda, porch, deck, or balcony [30
	inches (76 cm) minimum**]

^a vent shall not terminate directly above a side-walk or paved driveway which is located between two single family dwellings and serves both dwellings*

** only permitted if veranda, porch, deck, or balcony is fully open on a minimum of 2 sides beneath the fl oor*

* as specifi ed in CGA B149 Installation Codes, Note: local Codes or Regulation may require different clearances

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